(4x)(3x-3)+(5x+3)=180

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Solution for (4x)(3x-3)+(5x+3)=180 equation:


Simplifying
(4x)(3x + -3) + (5x + 3) = 180

Remove parenthesis around (4x)
4x(3x + -3) + (5x + 3) = 180

Reorder the terms:
4x(-3 + 3x) + (5x + 3) = 180
(-3 * 4x + 3x * 4x) + (5x + 3) = 180
(-12x + 12x2) + (5x + 3) = 180

Reorder the terms:
-12x + 12x2 + (3 + 5x) = 180

Remove parenthesis around (3 + 5x)
-12x + 12x2 + 3 + 5x = 180

Reorder the terms:
3 + -12x + 5x + 12x2 = 180

Combine like terms: -12x + 5x = -7x
3 + -7x + 12x2 = 180

Solving
3 + -7x + 12x2 = 180

Solving for variable 'x'.

Reorder the terms:
3 + -180 + -7x + 12x2 = 180 + -180

Combine like terms: 3 + -180 = -177
-177 + -7x + 12x2 = 180 + -180

Combine like terms: 180 + -180 = 0
-177 + -7x + 12x2 = 0

Begin completing the square.  Divide all terms by
12 the coefficient of the squared term: 

Divide each side by '12'.
-14.75 + -0.5833333333x + x2 = 0

Move the constant term to the right:

Add '14.75' to each side of the equation.
-14.75 + -0.5833333333x + 14.75 + x2 = 0 + 14.75

Reorder the terms:
-14.75 + 14.75 + -0.5833333333x + x2 = 0 + 14.75

Combine like terms: -14.75 + 14.75 = 0.00
0.00 + -0.5833333333x + x2 = 0 + 14.75
-0.5833333333x + x2 = 0 + 14.75

Combine like terms: 0 + 14.75 = 14.75
-0.5833333333x + x2 = 14.75

The x term is -0.5833333333x.  Take half its coefficient (-0.2916666667).
Square it (0.08506944446) and add it to both sides.

Add '0.08506944446' to each side of the equation.
-0.5833333333x + 0.08506944446 + x2 = 14.75 + 0.08506944446

Reorder the terms:
0.08506944446 + -0.5833333333x + x2 = 14.75 + 0.08506944446

Combine like terms: 14.75 + 0.08506944446 = 14.83506944446
0.08506944446 + -0.5833333333x + x2 = 14.83506944446

Factor a perfect square on the left side:
(x + -0.2916666667)(x + -0.2916666667) = 14.83506944446

Calculate the square root of the right side: 3.851632049

Break this problem into two subproblems by setting 
(x + -0.2916666667) equal to 3.851632049 and -3.851632049.

Subproblem 1

x + -0.2916666667 = 3.851632049 Simplifying x + -0.2916666667 = 3.851632049 Reorder the terms: -0.2916666667 + x = 3.851632049 Solving -0.2916666667 + x = 3.851632049 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2916666667' to each side of the equation. -0.2916666667 + 0.2916666667 + x = 3.851632049 + 0.2916666667 Combine like terms: -0.2916666667 + 0.2916666667 = 0.0000000000 0.0000000000 + x = 3.851632049 + 0.2916666667 x = 3.851632049 + 0.2916666667 Combine like terms: 3.851632049 + 0.2916666667 = 4.1432987157 x = 4.1432987157 Simplifying x = 4.1432987157

Subproblem 2

x + -0.2916666667 = -3.851632049 Simplifying x + -0.2916666667 = -3.851632049 Reorder the terms: -0.2916666667 + x = -3.851632049 Solving -0.2916666667 + x = -3.851632049 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2916666667' to each side of the equation. -0.2916666667 + 0.2916666667 + x = -3.851632049 + 0.2916666667 Combine like terms: -0.2916666667 + 0.2916666667 = 0.0000000000 0.0000000000 + x = -3.851632049 + 0.2916666667 x = -3.851632049 + 0.2916666667 Combine like terms: -3.851632049 + 0.2916666667 = -3.5599653823 x = -3.5599653823 Simplifying x = -3.5599653823

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.1432987157, -3.5599653823}

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